Buggy code:
public class ConcurrentUtilsTest { @ Test ( expected = IllegalArgumentException . class ) public void testConcurrentExceptionCauseUnchecked ( ) { } @ Test ( expected = IllegalArgumentException . class ) public void testConcurrentExceptionCauseError ( ) { } @ Test ( expected = IllegalArgumentException . class ) public void testConcurrentExceptionCauseNull ( ) { } @ Test ( expected = IllegalArgumentException . class ) public void testConcurrentRuntimeExceptionCauseUnchecked ( ) { } @ Test ( expected = IllegalArgumentException . class ) public void testConcurrentRuntimeExceptionCauseError ( ) { } @ Test ( expected = IllegalArgumentException . class ) public void testConcurrentRuntimeExceptionCauseNull ( ) { } @ Test public void testExtractCauseNull ( ) { } @ Test public void testExtractCauseNullCause ( ) { } @ Test public void testExtractCauseError ( ) { } @ Test public void testExtractCauseUncheckedException ( ) { } @ Test public void testExtractCauseChecked ( ) { } @ Test public void testExtractCauseUncheckedNull ( ) { } @ Test public void testExtractCauseUncheckedNullCause ( ) { } @ Test public void testExtractCauseUncheckedError ( ) { } @ Test public void testExtractCauseUncheckedUncheckedException ( ) { } @ Test public void testExtractCauseUncheckedChecked ( ) { } @ Test public void testHandleCauseError ( ) throws ConcurrentException { } @ Test public void testHandleCauseUncheckedException ( ) throws ConcurrentException { } @ Test public void testHandleCauseChecked ( ) { } @ Test public void testHandleCauseNull ( ) throws ConcurrentException { } @ Test public void testHandleCauseUncheckedError ( ) { } @ Test public void testHandleCauseUncheckedUncheckedException ( ) { } @ Test public void testHandleCauseUncheckedChecked ( ) { } @ Test public void testHandleCauseUncheckedNull ( ) { } @ Test public void testInitializeNull ( ) throws ConcurrentException { } @ Test public void testInitialize ( ) throws ConcurrentException { } @ Test public void testInitializeUncheckedNull ( ) { } @ Test public void testInitializeUnchecked ( ) throws ConcurrentException { } @ Test public void testInitializeUncheckedEx ( ) throws ConcurrentException { } @ Test public void testConstantFuture_Integer ( ) throws Exception { <START_BUG> Integer value = new Integer ( 5 ) ; <END_BUG> Future < Integer > test = ConcurrentUtils . constantFuture ( value ) ; assertTrue ( test . isDone ( ) ) ; assertSame ( value , test . get ( ) ) ; assertSame ( value , test . get ( 1000 , TimeUnit . SECONDS ) ) ; assertSame ( value , test . get ( 1000 , null ) ) ; assertFalse ( test . isCancelled ( ) ) ; assertFalse ( test . cancel ( true ) ) ; assertFalse ( test . cancel ( false ) ) ; } @ Test public void testConstantFuture_null ( ) throws Exception { } @ Test public void testPutIfAbsentKeyPresent ( ) { } @ Test public void testPutIfAbsentKeyNotPresent ( ) { } @ Test public void testPutIfAbsentNullMap ( ) { } @ Test public void testCreateIfAbsentKeyPresent ( ) throws ConcurrentException { } @ Test public void testCreateIfAbsentKeyNotPresent ( ) throws ConcurrentException { } @ Test public void testCreateIfAbsentNullMap ( ) throws ConcurrentException { } @ Test public void testCreateIfAbsentNullInit ( ) throws ConcurrentException { } @ Test public void testCreateIfAbsentUncheckedSuccess ( ) { } @ Test public void testCreateIfAbsentUncheckedException ( ) throws ConcurrentException { } }

Fix:
Integer value = Integer . valueOf ( 5 ) ;